High sensitivity optomechanical reference accelerometer over 10 kHz

Abstract

We present an optically-detected mechanical accelerometer that achieves a sensitivity of 100 ng/rtHz over a bandwidth of 10kHz and is traceable. We have incorporated a Fabry-Perot fiber-optic micro-cavity that is currently capable of measuring the test-mass displacement with sensitivities of 200 am/rtHz, and whose length determination enables traceability to the International System of Units (SI). The compact size and high mQ-product achieved combined with the high sensitivity and simplicity of the implemented optical detection scheme highlight our device and this category of accelerometers, outlining a path for high sensitivity reference acceleration measurements and observations in seismology and gravimetry.

References in corpus (4)

• Test of the Equivalence Principle Using a Rotating Torsion Balance
• Fiber Fabry-Perot cavity with high finesse
• Fiber-Cavity-Based Optomechanical Device
• Mechanical control of a microrod-resonator optical frequency comb

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